jetpack compose - ModalDrawer example

MainActivity.kt

package com.cfsuman.jetpackcompose

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberDrawerState
import androidx.compose.ui.Alignment
import androidx.compose.runtime.rememberCoroutineScope
import kotlinx.coroutines.launch


class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            GetScaffold()
        }
    }


    @Composable
    fun GetScaffold(){
        Scaffold(
            topBar = {TopAppBar(
                title = {Text(
                    "Compose - ModalDrawer",
                    color = Color.White)},
                backgroundColor = Color(0xFF58427C)) },
            content = {MainContent()},
            backgroundColor = Color(0xFFEDEAE0)
        )
    }


    @Composable
    fun MainContent(){
        val drawerState = rememberDrawerState(DrawerValue.Closed)
        val scope = rememberCoroutineScope()

        ModalDrawer(
            drawerState = drawerState,
            drawerContent = {
                Box(
                    Modifier
                        .fillMaxSize()
                        .background(Color(0xFfF0F8FF))
                        .padding(12.dp)
                        .wrapContentSize(Alignment.TopStart)
                ){
                    OutlinedButton(
                        modifier = Modifier
                            .fillMaxWidth()
                            .padding(8.dp),
                        onClick = { scope.launch { drawerState.close() } },
                        content = { Text("Close Drawer") }
                    )
                }
            },

            content = {
                Column(
                    modifier = Modifier
                        .fillMaxSize()
                        .padding(16.dp),
                    horizontalAlignment = Alignment.CenterHorizontally,
                    verticalArrangement = Arrangement.Center
                ) {
                    Text(
                        text = if (drawerState.isClosed)
                            "Swipe >> to open drawer"
                        else "Swipe <<< to close drawer"
                    )
                    Spacer(Modifier.height(25.dp))
                    Button(
                        onClick = { scope.launch { drawerState.open() } },
                        colors = ButtonDefaults.buttonColors(
                            backgroundColor = Color(0xFF8DB600)
                        )
                    ) {
                        Text("Open Drawer")
                    }
                }
            }
        )
    }


    @Preview
    @Composable
    fun ComposablePreview(){
        //GetScaffold()
    }
}